VSC8244
Data Sheet
Contents
1
2
3
4
5
6
7
General Description ......................................................................................................................................... 1
System Diagrams ............................................................................................................................................. 1
Features............................................................................................................................................... Benefits2
Applications...................................................................................................................................................... 2
Device Block Diagram...................................................................................................................................... 3
Relevant Specifications & Documentation .................................................................................................. 12
VSC8244 Differences vs. VSC8224/VSC8234 Devices ................................................................................ 13
7.1
7.2
7.3
VSC8244 Functional Differences ..............................................................................................................................13
VSC8244 Register Differences .................................................................................................................................13
VSC8244 Pinout Differences ....................................................................................................................................14
8
9
Data Sheet Conventions ................................................................................................................................ 14
Package Pin Assignments & Signal Descriptions....................................................................................... 15
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
260 HS-PBGA Package Ball Diagram ......................................................................................................................15
BGA Ball to Signal Name Cross Reference (LEFT side) .........................................................................................16
BGA Ball to Signal Name Cross Reference (RIGHT side) ........................................................................................17
Signal Type Descriptions ..........................................................................................................................................18
MAC Transmit Interface (MAC TX) Pins ...................................................................................................................19
MAC Receive Interface (MAC RX) Pins ....................................................................................................................20
Twisted Pair Interface Pins .......................................................................................................................................21
Serial Management Interface Pins (IEEE SMI) .........................................................................................................22
Serial EEPROM Interface Pins .................................................................................................................................23
9.10 Configuration and Control Pins .................................................................................................................................23
9.11 System Clock Interface Pins .....................................................................................................................................24
9.12 LED Interface Pins ....................................................................................................................................................24
9.13 JTAG Test Access Port Pins .....................................................................................................................................25
9.14 Analog Bias Pins .......................................................................................................................................................25
9.15 HSTL Voltage Reference Pins .................................................................................................................................. 25
9.16 No Connect Pins...................................................................................................................................................... 26
9.17 Power Supply Pins ....................................................................................................................................................26
9.18 Power Supply and Associated Functional Pins .........................................................................................................27
10 System Schematics........................................................................................................................................ 28
10.1 Input Clock Options ..................................................................................................................................................29
10.2 Analog Bias Pins Configuration ................................................................................................................................30
11 MAC Interfaces ............................................................................................................................................... 31
11.1 RGMII MAC I/F .........................................................................................................................................................31
11.2 RTBI MAC I/F ............................................................................................................................................................32
4 of 7
VMDS-10108 Revision 4.1
7
June 2006
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